Saruhan, I.Tuncer, C.2020-03-262020-03-262009978-90-6605-712-80567-7572https://hdl.handle.net/20.500.12395/237697th International Congress on Hazelnut -- 40117 -- Viterbo, ITALYThis study was carried out in order to determine population density and seasonal fluctuations of the Green Shield Bug in the Samsun, Ordu and Giresun provinces of Turkey between 2001 and 2003. The first overwintering adults were mostly seen in mid-April in hazelnut orchards. The new generation of adults appeared in July. The adults were present in orchards from mid-April until the end of October. The adult population density reached the highest level during August in general. Nymphs were mostly observed from June until the end of August in hazelnut orchards. The first two stages of nymphs tended to be on herbs in hazelnut orchards. Population density reached the peak level at the end of July and revealed as 10 insects/10 "plants"("plants", which is polycormic hazelnut tree, henceforth called: plants) in the Ordu province in 2001. The peak time of population density in the Giresun province was again late July and density levels were 15.2 insects/10 plants in the same year. Population density reached the highest level in early August in the Samsun province for three successive years. Population levels were 14.9, 51.5 and 45.5 insects/10 plants for 2001, 2002 and 2003 respectively. In general, population density, fluctuations and biology of the Green Shield Bug changed depending on years and locations.eninfo:eu-repo/semantics/closedAccesshazelnutPalomena prasinapopulationdensityfluctuationsConference Object845549554Q4WOS:000305695500086N/A